Replacing multiple occurences of a character in a string with python

Question

I need to replace words like goooooooooooood with good. For this i tried

t.replace(r'(.)\2+',r'\2')

where t is some word like gooooooooooood

but this doesn't work.

Does not make sense, why should goooooooooooood be good and not god? — Abhijit
– Abhijit, Commented Nov 11, 2012 at 15:54
t seems to be a string, that means you're not using regex but regular character replacement here. — mata
– mata, Commented Nov 11, 2012 at 15:58
when a user types in gooooood, he's most likely referring to good and not god eg: the burger here was goooooooooooood — ami91
– ami91, Commented Nov 11, 2012 at 16:09
@user1747696: How is the program supposed to know which to use, one or two? — David Robinson
– David Robinson, Commented Nov 11, 2012 at 16:49

Abhijit · Accepted Answer · 2012-11-11 16:18:05Z

3

What you are looking for is a spell checker. There are multiple ways of doing it but few ways I found useful is

answered Nov 11, 2012 at 16:18

Abhijit

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Ashwini Chaudhary · Accepted Answer · 2012-11-11 15:54:51Z

2

You can use itertools.groupby():

In [53]: strs="goooooooooooood"

In [54]: from itertools import groupby

In [55]: "".join(k*2 if len(list(g))>=2 else k for k,g in groupby(strs))
Out[55]: 'good'

answered Nov 11, 2012 at 15:54

Ashwini Chaudhary

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alex_jordan · Accepted Answer · 2012-11-11 15:59:12Z

0

Regex solution

import re

s = "goooooooooooooood"
print re.sub(r'(.)\1{2,}', r'\1', s)

or

print re.sub(r'(.)\1{3,}', r'\1\1', s)

To replace gooooooooooood with good

answered Nov 11, 2012 at 15:59

alex_jordan

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